DTC C0040-13: Brake Pedal Switch "A" Circuit Open [10/2022 - ]: Procedure

Pre-procedure1

• Connect the GTS to the DLC3.
• Turn the ignition switch to ON.

• Select the Data List using the GTS.

  HINT: 

  Refer to DATA LIST / ACTIVE TEST [10/2022 - ]

  Chassis > Brake/EPB > Data List 

  Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
  Brake Pedal Load Sensing SW	Brake pedal load sensing switch	OFF / ON	OFF: Brake pedal released ON: Brake pedal depressed	-

  Chassis > Brake/EPB > Data List 

  Tester Display
  Brake Pedal Load Sensing SW

• Check that the brake pedal load sensing switch display observed on the GTS changes according to brake pedal operation.

  OK

  The GTS displays OFF / ON according to brake pedal operation.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  4

Result: 

OK 

See step  2

Pre-procedure1

• None

• Operate the GTS to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

  Chassis > Brake/EPB > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Press the DTC clear button.
• Turn the ignition switch off.

Result: 

NEXT 

See step  3

Pre-procedure1

• Start the engine.
• Perform a road test.

• Read the DTCs following the prompts on the GTS. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

  Chassis > Brake/EPB > Trouble Codes 

• Check if the same DTC is output.

  Result

  Result	Proceed to
  C0040-13 is not output	A
  C0040-13 is output	B

Post-procedure1

• None

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

B 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Pre-procedure1

• Turn the ignition switch off.

• Make sure that there is no looseness at the locking part and the connecting part of the connectors.

  OK

  The connector is securely connected.

Pre-procedure2

• Disconnect the A35 brake pedal load sensing switch (brake pedal support assembly) connector.
• Disconnect the A31 skid control ECU (brake actuator assembly) connector.

• Check both the connector case and the terminals for deformation and corrosion.

  OK

  No deformation or corrosion.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A35-2 (FSW+) - A31-28 (FSW+)	Always	Below 1 Ω	Ω
  A35-2 (FSW+) or A31-28 (FSW+) - Body ground	Always	10 kΩ or higher	kΩ
  A35-1 (FSW-) - Body ground	1 minute or more after disconnecting the cable from the negative (-) battery terminal	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Refer to ON-VEHICLE INSPECTION [10/2022 - ] 

OK

The brake pedal load sensing switch (brake pedal support assembly) is normal.

Result

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY. Refer to  REMOVAL [10/2022 - ]